Influence of climatic conditions on the yield of summer barley in the Republic of Tyva

The territory of the Republic of Tyva due to cli-matic conditions is a zone of risky agriculture with sharply continental climate. Such conditions do not allow receiving stable and big yields. In this regard the research on the identification of climatic adapted samples using more the potential in the formation of grain yield is very actual. The research objective was to estimate the influence of weather conditions on the productivity of grain of samples of summer barley in the conditions of the Republic of Tyva. Researches were conducted in the field of Tuva research institute of agriculture in 2011-2015. The predecessor was pure bare fallow. The soil was dark-chestnut sandy loam, with neutral soil reaction of pH-7.0. The objects of studying were 10 samples of summer barley: Vitim; U-50-3808; U-53-3808; U-53-3828; U-53-3837; U-47-3778; U-47-3787; U-49-3796; L-19-101; L-21-116; as the standard we used the grade Donetsk 8. The weather conditions in the years of research were various: 2011, 2013 were superfluous damp (SCC = 1.74, 1.92); 2014 was moderately damp (1.29); 2012 was insufficiently damp (1.18); 2015 was droughty (0.73). In such conditions it was revealed that weak security with the rainfall of the spring pe-riod in May significantly influenced (r =-0.326±0.127 …-0.822±0.065) productivity. In June, July and August in all samples positive communica-tions with precipitations were observed. The high-est communication at the sample of U-50-3808 in June (r = 0.501±0.109); July (r = 0.804±0.068); August (r = 0.770±0.074). Temperature condition with productivity had the following communications: in May positive in the most fruitful samples (r = 0.096±0.147 … 0.399±0.120), were most ex-pressed at a standard grade (r = 0.594±0.098). In June-August had negative communications: in June Donetsk standard 8 (r =-0.382±0.121) and all sam-ples (r =-0.919±0.044 …-0.973±0.025); in July the standard (r =-0.478±0.111), all samples (r =-0.297±0.125 …-0.415±0.118), thus the sample of L-19-101 with the smallest negative correlation (r =-0.297±0.129), therefore, used bioclimatic re-sources more effectively and by that exceeded in the crop the standard on 1.9 c/hectare. We consid-er that (r = 0.336±0.126 … 0.675±0.088) and simi-lar need to be involved samples of U-53-3808, U-49-3796, L-19-101, L-21-116, U-53-3828 in the selection with the grades which are widely cultivat-ed in this territory.